四川芦山M_s 7.0级地震导致周边断层的应力变化
|
摘要
2013年4月20日,四川雅安市芦山县发生Ms 7.0级强烈地震,造成重大的人员伤亡和经济损失。地震造成的区域库仑应力变化、对周围断层的影响及后续地震带发展趋势是应该关注的问题。利用USGS震源机制解,根据地震静态触发原理,基于弹性位错理论和分层地壳模型,计算得出芦山地震引起同震库仑应力变化从断层的1.0MPa量级减小到200km外的0.1kPa,研究认为在地震之后大部分区域的应力得到释放,鲜水河断裂道孚—康定段和玉龙希断裂南段危险性增加。
On April 20,2013,a M s 7.0 earthquake happened in Lushan,Sichuan Province,which killed and hurted hundreds of people,also resulted in huge financial loss.People usually cared about the changes of coulomb failure stress caused by the earthquake,and the effect on the adjacent faults,and subsequent progress after this earthquake.Based on seismic static triggering principle,the elastic dislocation theory,layered crustal model,we used the USGS focal mechanism solution,the coseismic coulomb failure stress is 1.0MPa to 0.1kPa from fault plane to 200km,stress was released in most of the area,however,the Daofu and Yulongxi Segment of Xianshuihe Fault became more dangerous.
On April 20,2013,a M s 7.0 earthquake happened in Lushan,Sichuan Province,which killed and hurted hundreds of people,also resulted in huge financial loss.People usually cared about the changes of coulomb failure stress caused by the earthquake,and the effect on the adjacent faults,and subsequent progress after this earthquake.Based on seismic static triggering principle,the elastic dislocation theory,layered crustal model,we used the USGS focal mechanism solution,the coseismic coulomb failure stress is 1.0MPa to 0.1kPa from fault plane to 200km,stress was released in most of the area,however,the Daofu and Yulongxi Segment of Xianshuihe Fault became more dangerous.
引文
[1]石耀霖,曹建玲.库仑应力计算及应用过程中若干问题的讨论——以汶川地震为例[J].地球物理学报,2010,53(1):102-110.Shi Yaolin,Cao Jianling.Chinese Journal of Geophysics,2010,53(1):102-110.
[2]石耀霖.关于应力触发和应力影概念在地震预报中应用的一些思考[J].地震,2001,21(3):1-7.Shi Yaolin.Earthquake,2001,21(3):1-7.
[3]腾吉文,白登海,杨辉,等.2008汶川M s8.0地震发生的深层过程和动力学响应[J].地球物理学报,2008,51(5):1385-1402.Teng Jiwen,Bai Denghai,Yang Hui,et al.Chinese Journal of Geophysics,2008,51(5):1385-1402.
[4]张培震.青藏高原东缘川西地区的现今构造变形、应变分配与深部动力过程[J].中国科学D辑:地球科学,2008,38(9):1041-1056.Zhang Peizhen.Science in China,Series D:Earth Sciences,2008,38(9):1041-1056.
[5]赵友年,蒋良志,魏继裕,等.雅安地区地震地质特征与地震活动性研究[J].四川地震,1990(2):1-48.Zhao Younian,Jiang Liangzhi,Wei Jiyu,et al.Earthquake Research in Sichuan,1990(2):1-48.
[6]秦向辉,陈群策,谭成轩,等.龙门山断裂带西南段现今地应力状态与地震危险性分析[J].岩石力学与工程学报,2013,32(S1):2870-2876.Qin Xianghui,Chen Qunce,Tan Chengxuan,et al.Chinese Journal of Rock Mechanics and Engineering,2013,32(S1):2870-2876.
[7]陈群策,丰成君,孟文,等.5.12汶川地震后龙门山断裂带东北段现今地应力测量结果分析[J].地球物理学报,2012,55(12):3923-3932.Chen Qunce,Feng Chengjun,Mengwen,et al.Chinese Journal of Geophysics,2012,55(12):3923-3932.
[8]Jaeger J C,Cook N G W,Zimmerman R.Fundamentals of rock mechanics[M].Hoboken,New Jersey,USA:Wiley-Blackwell,2009.
[9]Wang R,Lorenzo-Martín F,Roth F.PSGRN/PSCMP—A new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic-gravitational dislocation theory[J].Computers&Geosciences,2006,32(4):527-541.
[10]Wang R.A simple orthonormalization method for stable and efficient computation of Green's functions[J].Bulletin of the Seismological Society of America,1999,89(3):733-741.
[11]单斌,熊熊,郑勇,等.2008年5月12日M w7.9汶川地震导致的周边断层应力变化[J].中国科学D辑:地球科学,2009,39(5):537-545.Shan Bin,Xiong Xiong,Zheng Yong,et al.Science in China,Series D:Earth Sciences,2009,39(5):537-545.
[2]石耀霖.关于应力触发和应力影概念在地震预报中应用的一些思考[J].地震,2001,21(3):1-7.Shi Yaolin.Earthquake,2001,21(3):1-7.
[3]腾吉文,白登海,杨辉,等.2008汶川M s8.0地震发生的深层过程和动力学响应[J].地球物理学报,2008,51(5):1385-1402.Teng Jiwen,Bai Denghai,Yang Hui,et al.Chinese Journal of Geophysics,2008,51(5):1385-1402.
[4]张培震.青藏高原东缘川西地区的现今构造变形、应变分配与深部动力过程[J].中国科学D辑:地球科学,2008,38(9):1041-1056.Zhang Peizhen.Science in China,Series D:Earth Sciences,2008,38(9):1041-1056.
[5]赵友年,蒋良志,魏继裕,等.雅安地区地震地质特征与地震活动性研究[J].四川地震,1990(2):1-48.Zhao Younian,Jiang Liangzhi,Wei Jiyu,et al.Earthquake Research in Sichuan,1990(2):1-48.
[6]秦向辉,陈群策,谭成轩,等.龙门山断裂带西南段现今地应力状态与地震危险性分析[J].岩石力学与工程学报,2013,32(S1):2870-2876.Qin Xianghui,Chen Qunce,Tan Chengxuan,et al.Chinese Journal of Rock Mechanics and Engineering,2013,32(S1):2870-2876.
[7]陈群策,丰成君,孟文,等.5.12汶川地震后龙门山断裂带东北段现今地应力测量结果分析[J].地球物理学报,2012,55(12):3923-3932.Chen Qunce,Feng Chengjun,Mengwen,et al.Chinese Journal of Geophysics,2012,55(12):3923-3932.
[8]Jaeger J C,Cook N G W,Zimmerman R.Fundamentals of rock mechanics[M].Hoboken,New Jersey,USA:Wiley-Blackwell,2009.
[9]Wang R,Lorenzo-Martín F,Roth F.PSGRN/PSCMP—A new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic-gravitational dislocation theory[J].Computers&Geosciences,2006,32(4):527-541.
[10]Wang R.A simple orthonormalization method for stable and efficient computation of Green's functions[J].Bulletin of the Seismological Society of America,1999,89(3):733-741.
[11]单斌,熊熊,郑勇,等.2008年5月12日M w7.9汶川地震导致的周边断层应力变化[J].中国科学D辑:地球科学,2009,39(5):537-545.Shan Bin,Xiong Xiong,Zheng Yong,et al.Science in China,Series D:Earth Sciences,2009,39(5):537-545.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心